diff --git a/Cargo.lock b/Cargo.lock
index 426b500..2557b60 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -456,7 +456,7 @@ version = "0.1.0"
 dependencies = [
  "failure 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "hex 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "proptest 0.9.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proptest 0.9.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "ring 0.13.5 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -1127,7 +1127,7 @@ dependencies = [
 
 [[package]]
 name = "proptest"
-version = "0.9.4"
+version = "0.9.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "bit-set 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -2288,7 +2288,7 @@ dependencies = [
 "checksum pretty_env_logger 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)" = "717ee476b1690853d222af4634056d830b5197ffd747726a9a1eee6da9f49074"
 "checksum proc-macro2 0.4.30 (registry+https://github.com/rust-lang/crates.io-index)" = "cf3d2011ab5c909338f7887f4fc896d35932e29146c12c8d01da6b22a80ba759"
 "checksum proc-macro2 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)" = "4c5c2380ae88876faae57698be9e9775e3544decad214599c3a6266cca6ac802"
-"checksum proptest 0.9.4 (registry+https://github.com/rust-lang/crates.io-index)" = "cf147e022eacf0c8a054ab864914a7602618adba841d800a9a9868a5237a529f"
+"checksum proptest 0.9.5 (registry+https://github.com/rust-lang/crates.io-index)" = "bf6147d103a7c9d7598f4105cf049b15c99e2ecd93179bf024f0fd349be5ada4"
 "checksum publicsuffix 1.5.2 (registry+https://github.com/rust-lang/crates.io-index)" = "5afecba86dcf1e4fd610246f89899d1924fe12e1e89f555eb7c7f710f3c5ad1d"
 "checksum quick-error 1.2.2 (registry+https://github.com/rust-lang/crates.io-index)" = "9274b940887ce9addde99c4eee6b5c44cc494b182b97e73dc8ffdcb3397fd3f0"
 "checksum quote 0.6.12 (registry+https://github.com/rust-lang/crates.io-index)" = "faf4799c5d274f3868a4aae320a0a182cbd2baee377b378f080e16a23e9d80db"
diff --git a/crypto/Cargo.toml b/crypto/Cargo.toml
index bda9cc2..5cecd8f 100644
--- a/crypto/Cargo.toml
+++ b/crypto/Cargo.toml
@@ -10,4 +10,4 @@ hex = "0.4.0"
 ring = "0.13.5"
 
 [dev-dependencies]
-proptest = "0.9.4"
+proptest = "0.9.5"